mirror of https://gitee.com/openkylin/linux.git
471 lines
13 KiB
C
471 lines
13 KiB
C
/*******************************************************************************
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Intel 82599 Virtual Function driver
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Copyright(c) 1999 - 2014 Intel Corporation.
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This program is free software; you can redistribute it and/or modify it
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under the terms and conditions of the GNU General Public License,
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version 2, as published by the Free Software Foundation.
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This program is distributed in the hope it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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The full GNU General Public License is included in this distribution in
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the file called "COPYING".
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Contact Information:
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e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
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Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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*******************************************************************************/
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#ifndef _IXGBEVF_H_
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#define _IXGBEVF_H_
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#include <linux/types.h>
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#include <linux/bitops.h>
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#include <linux/timer.h>
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#include <linux/io.h>
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#include <linux/netdevice.h>
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#include <linux/if_vlan.h>
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#include <linux/u64_stats_sync.h>
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#include "vf.h"
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#ifdef CONFIG_NET_RX_BUSY_POLL
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#include <net/busy_poll.h>
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#define BP_EXTENDED_STATS
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#endif
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/* wrapper around a pointer to a socket buffer,
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* so a DMA handle can be stored along with the buffer */
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struct ixgbevf_tx_buffer {
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union ixgbe_adv_tx_desc *next_to_watch;
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unsigned long time_stamp;
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struct sk_buff *skb;
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unsigned int bytecount;
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unsigned short gso_segs;
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__be16 protocol;
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DEFINE_DMA_UNMAP_ADDR(dma);
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DEFINE_DMA_UNMAP_LEN(len);
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u32 tx_flags;
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};
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struct ixgbevf_rx_buffer {
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struct sk_buff *skb;
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dma_addr_t dma;
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};
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struct ixgbevf_stats {
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u64 packets;
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u64 bytes;
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#ifdef BP_EXTENDED_STATS
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u64 yields;
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u64 misses;
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u64 cleaned;
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#endif
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};
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struct ixgbevf_tx_queue_stats {
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u64 restart_queue;
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u64 tx_busy;
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u64 tx_done_old;
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};
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struct ixgbevf_rx_queue_stats {
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u64 non_eop_descs;
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u64 alloc_rx_page_failed;
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u64 alloc_rx_buff_failed;
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u64 csum_err;
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};
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struct ixgbevf_ring {
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struct ixgbevf_ring *next;
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struct net_device *netdev;
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struct device *dev;
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void *desc; /* descriptor ring memory */
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dma_addr_t dma; /* phys. address of descriptor ring */
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unsigned int size; /* length in bytes */
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unsigned int count; /* amount of descriptors */
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unsigned int next_to_use;
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unsigned int next_to_clean;
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union {
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struct ixgbevf_tx_buffer *tx_buffer_info;
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struct ixgbevf_rx_buffer *rx_buffer_info;
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};
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struct ixgbevf_stats stats;
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struct u64_stats_sync syncp;
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union {
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struct ixgbevf_tx_queue_stats tx_stats;
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struct ixgbevf_rx_queue_stats rx_stats;
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};
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u64 hw_csum_rx_error;
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u8 __iomem *tail;
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u16 reg_idx; /* holds the special value that gets the hardware register
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* offset associated with this ring, which is different
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* for DCB and RSS modes */
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u16 rx_buf_len;
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int queue_index; /* needed for multiqueue queue management */
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};
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/* How many Rx Buffers do we bundle into one write to the hardware ? */
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#define IXGBEVF_RX_BUFFER_WRITE 16 /* Must be power of 2 */
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#define MAX_RX_QUEUES IXGBE_VF_MAX_RX_QUEUES
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#define MAX_TX_QUEUES IXGBE_VF_MAX_TX_QUEUES
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#define IXGBEVF_DEFAULT_TXD 1024
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#define IXGBEVF_DEFAULT_RXD 512
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#define IXGBEVF_MAX_TXD 4096
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#define IXGBEVF_MIN_TXD 64
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#define IXGBEVF_MAX_RXD 4096
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#define IXGBEVF_MIN_RXD 64
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/* Supported Rx Buffer Sizes */
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#define IXGBEVF_RXBUFFER_256 256 /* Used for packet split */
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#define IXGBEVF_RXBUFFER_2K 2048
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#define IXGBEVF_RXBUFFER_4K 4096
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#define IXGBEVF_RXBUFFER_8K 8192
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#define IXGBEVF_RXBUFFER_10K 10240
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#define IXGBEVF_RX_HDR_SIZE IXGBEVF_RXBUFFER_256
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#define MAXIMUM_ETHERNET_VLAN_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
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#define IXGBE_TX_FLAGS_CSUM (u32)(1)
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#define IXGBE_TX_FLAGS_VLAN (u32)(1 << 1)
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#define IXGBE_TX_FLAGS_TSO (u32)(1 << 2)
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#define IXGBE_TX_FLAGS_IPV4 (u32)(1 << 3)
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#define IXGBE_TX_FLAGS_VLAN_MASK 0xffff0000
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#define IXGBE_TX_FLAGS_VLAN_PRIO_MASK 0x0000e000
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#define IXGBE_TX_FLAGS_VLAN_SHIFT 16
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struct ixgbevf_ring_container {
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struct ixgbevf_ring *ring; /* pointer to linked list of rings */
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unsigned int total_bytes; /* total bytes processed this int */
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unsigned int total_packets; /* total packets processed this int */
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u8 count; /* total number of rings in vector */
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u8 itr; /* current ITR setting for ring */
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};
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/* iterator for handling rings in ring container */
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#define ixgbevf_for_each_ring(pos, head) \
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for (pos = (head).ring; pos != NULL; pos = pos->next)
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/* MAX_MSIX_Q_VECTORS of these are allocated,
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* but we only use one per queue-specific vector.
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*/
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struct ixgbevf_q_vector {
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struct ixgbevf_adapter *adapter;
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u16 v_idx; /* index of q_vector within array, also used for
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* finding the bit in EICR and friends that
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* represents the vector for this ring */
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u16 itr; /* Interrupt throttle rate written to EITR */
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struct napi_struct napi;
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struct ixgbevf_ring_container rx, tx;
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char name[IFNAMSIZ + 9];
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#ifdef CONFIG_NET_RX_BUSY_POLL
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unsigned int state;
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#define IXGBEVF_QV_STATE_IDLE 0
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#define IXGBEVF_QV_STATE_NAPI 1 /* NAPI owns this QV */
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#define IXGBEVF_QV_STATE_POLL 2 /* poll owns this QV */
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#define IXGBEVF_QV_STATE_DISABLED 4 /* QV is disabled */
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#define IXGBEVF_QV_OWNED (IXGBEVF_QV_STATE_NAPI | IXGBEVF_QV_STATE_POLL)
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#define IXGBEVF_QV_LOCKED (IXGBEVF_QV_OWNED | IXGBEVF_QV_STATE_DISABLED)
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#define IXGBEVF_QV_STATE_NAPI_YIELD 8 /* NAPI yielded this QV */
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#define IXGBEVF_QV_STATE_POLL_YIELD 16 /* poll yielded this QV */
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#define IXGBEVF_QV_YIELD (IXGBEVF_QV_STATE_NAPI_YIELD | IXGBEVF_QV_STATE_POLL_YIELD)
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#define IXGBEVF_QV_USER_PEND (IXGBEVF_QV_STATE_POLL | IXGBEVF_QV_STATE_POLL_YIELD)
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spinlock_t lock;
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#endif /* CONFIG_NET_RX_BUSY_POLL */
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};
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#ifdef CONFIG_NET_RX_BUSY_POLL
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static inline void ixgbevf_qv_init_lock(struct ixgbevf_q_vector *q_vector)
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{
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spin_lock_init(&q_vector->lock);
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q_vector->state = IXGBEVF_QV_STATE_IDLE;
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}
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/* called from the device poll routine to get ownership of a q_vector */
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static inline bool ixgbevf_qv_lock_napi(struct ixgbevf_q_vector *q_vector)
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{
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int rc = true;
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spin_lock_bh(&q_vector->lock);
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if (q_vector->state & IXGBEVF_QV_LOCKED) {
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WARN_ON(q_vector->state & IXGBEVF_QV_STATE_NAPI);
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q_vector->state |= IXGBEVF_QV_STATE_NAPI_YIELD;
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rc = false;
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#ifdef BP_EXTENDED_STATS
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q_vector->tx.ring->stats.yields++;
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#endif
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} else {
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/* we don't care if someone yielded */
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q_vector->state = IXGBEVF_QV_STATE_NAPI;
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}
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spin_unlock_bh(&q_vector->lock);
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return rc;
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}
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/* returns true is someone tried to get the qv while napi had it */
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static inline bool ixgbevf_qv_unlock_napi(struct ixgbevf_q_vector *q_vector)
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{
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int rc = false;
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spin_lock_bh(&q_vector->lock);
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WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_POLL |
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IXGBEVF_QV_STATE_NAPI_YIELD));
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if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
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rc = true;
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/* reset state to idle, unless QV is disabled */
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q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
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spin_unlock_bh(&q_vector->lock);
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return rc;
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}
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/* called from ixgbevf_low_latency_poll() */
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static inline bool ixgbevf_qv_lock_poll(struct ixgbevf_q_vector *q_vector)
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{
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int rc = true;
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spin_lock_bh(&q_vector->lock);
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if ((q_vector->state & IXGBEVF_QV_LOCKED)) {
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q_vector->state |= IXGBEVF_QV_STATE_POLL_YIELD;
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rc = false;
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#ifdef BP_EXTENDED_STATS
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q_vector->rx.ring->stats.yields++;
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#endif
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} else {
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/* preserve yield marks */
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q_vector->state |= IXGBEVF_QV_STATE_POLL;
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}
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spin_unlock_bh(&q_vector->lock);
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return rc;
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}
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/* returns true if someone tried to get the qv while it was locked */
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static inline bool ixgbevf_qv_unlock_poll(struct ixgbevf_q_vector *q_vector)
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{
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int rc = false;
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spin_lock_bh(&q_vector->lock);
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WARN_ON(q_vector->state & (IXGBEVF_QV_STATE_NAPI));
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if (q_vector->state & IXGBEVF_QV_STATE_POLL_YIELD)
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rc = true;
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/* reset state to idle, unless QV is disabled */
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q_vector->state &= IXGBEVF_QV_STATE_DISABLED;
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spin_unlock_bh(&q_vector->lock);
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return rc;
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}
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/* true if a socket is polling, even if it did not get the lock */
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static inline bool ixgbevf_qv_busy_polling(struct ixgbevf_q_vector *q_vector)
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{
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WARN_ON(!(q_vector->state & IXGBEVF_QV_OWNED));
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return q_vector->state & IXGBEVF_QV_USER_PEND;
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}
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/* false if QV is currently owned */
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static inline bool ixgbevf_qv_disable(struct ixgbevf_q_vector *q_vector)
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{
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int rc = true;
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spin_lock_bh(&q_vector->lock);
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if (q_vector->state & IXGBEVF_QV_OWNED)
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rc = false;
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q_vector->state |= IXGBEVF_QV_STATE_DISABLED;
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spin_unlock_bh(&q_vector->lock);
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return rc;
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}
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#endif /* CONFIG_NET_RX_BUSY_POLL */
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/*
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* microsecond values for various ITR rates shifted by 2 to fit itr register
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* with the first 3 bits reserved 0
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*/
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#define IXGBE_MIN_RSC_ITR 24
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#define IXGBE_100K_ITR 40
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#define IXGBE_20K_ITR 200
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#define IXGBE_10K_ITR 400
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#define IXGBE_8K_ITR 500
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/* Helper macros to switch between ints/sec and what the register uses.
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* And yes, it's the same math going both ways. The lowest value
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* supported by all of the ixgbe hardware is 8.
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*/
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#define EITR_INTS_PER_SEC_TO_REG(_eitr) \
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((_eitr) ? (1000000000 / ((_eitr) * 256)) : 8)
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#define EITR_REG_TO_INTS_PER_SEC EITR_INTS_PER_SEC_TO_REG
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static inline u16 ixgbevf_desc_unused(struct ixgbevf_ring *ring)
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{
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u16 ntc = ring->next_to_clean;
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u16 ntu = ring->next_to_use;
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return ((ntc > ntu) ? 0 : ring->count) + ntc - ntu - 1;
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}
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static inline void ixgbevf_write_tail(struct ixgbevf_ring *ring, u32 value)
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{
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writel(value, ring->tail);
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}
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#define IXGBEVF_RX_DESC(R, i) \
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(&(((union ixgbe_adv_rx_desc *)((R)->desc))[i]))
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#define IXGBEVF_TX_DESC(R, i) \
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(&(((union ixgbe_adv_tx_desc *)((R)->desc))[i]))
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#define IXGBEVF_TX_CTXTDESC(R, i) \
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(&(((struct ixgbe_adv_tx_context_desc *)((R)->desc))[i]))
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#define IXGBE_MAX_JUMBO_FRAME_SIZE 9728 /* Maximum Supported Size 9.5KB */
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#define OTHER_VECTOR 1
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#define NON_Q_VECTORS (OTHER_VECTOR)
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#define MAX_MSIX_Q_VECTORS 2
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#define MIN_MSIX_Q_VECTORS 1
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#define MIN_MSIX_COUNT (MIN_MSIX_Q_VECTORS + NON_Q_VECTORS)
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/* board specific private data structure */
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struct ixgbevf_adapter {
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struct timer_list watchdog_timer;
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unsigned long active_vlans[BITS_TO_LONGS(VLAN_N_VID)];
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struct work_struct reset_task;
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struct ixgbevf_q_vector *q_vector[MAX_MSIX_Q_VECTORS];
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/* Interrupt Throttle Rate */
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u16 rx_itr_setting;
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u16 tx_itr_setting;
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/* interrupt masks */
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u32 eims_enable_mask;
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u32 eims_other;
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/* TX */
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int num_tx_queues;
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struct ixgbevf_ring *tx_ring[MAX_TX_QUEUES]; /* One per active queue */
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u64 restart_queue;
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u32 tx_timeout_count;
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/* RX */
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int num_rx_queues;
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struct ixgbevf_ring *rx_ring[MAX_TX_QUEUES]; /* One per active queue */
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u64 hw_csum_rx_error;
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u64 hw_rx_no_dma_resources;
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u64 non_eop_descs;
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int num_msix_vectors;
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u32 alloc_rx_page_failed;
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u32 alloc_rx_buff_failed;
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/* Some features need tri-state capability,
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* thus the additional *_CAPABLE flags.
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*/
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u32 flags;
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#define IXGBE_FLAG_IN_WATCHDOG_TASK (u32)(1)
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#define IXGBE_FLAG_IN_NETPOLL (u32)(1 << 1)
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#define IXGBEVF_FLAG_QUEUE_RESET_REQUESTED (u32)(1 << 2)
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struct msix_entry *msix_entries;
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/* OS defined structs */
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struct net_device *netdev;
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struct pci_dev *pdev;
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/* structs defined in ixgbe_vf.h */
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struct ixgbe_hw hw;
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u16 msg_enable;
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u16 bd_number;
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/* Interrupt Throttle Rate */
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u32 eitr_param;
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struct ixgbevf_hw_stats stats;
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unsigned long state;
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u64 tx_busy;
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unsigned int tx_ring_count;
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unsigned int rx_ring_count;
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#ifdef BP_EXTENDED_STATS
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u64 bp_rx_yields;
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u64 bp_rx_cleaned;
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u64 bp_rx_missed;
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u64 bp_tx_yields;
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u64 bp_tx_cleaned;
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u64 bp_tx_missed;
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#endif
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u8 __iomem *io_addr; /* Mainly for iounmap use */
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u32 link_speed;
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bool link_up;
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spinlock_t mbx_lock;
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struct work_struct watchdog_task;
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};
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enum ixbgevf_state_t {
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__IXGBEVF_TESTING,
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__IXGBEVF_RESETTING,
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__IXGBEVF_DOWN,
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__IXGBEVF_DISABLED,
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__IXGBEVF_REMOVING,
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__IXGBEVF_WORK_INIT,
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};
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struct ixgbevf_cb {
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struct sk_buff *prev;
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};
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#define IXGBE_CB(skb) ((struct ixgbevf_cb *)(skb)->cb)
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enum ixgbevf_boards {
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board_82599_vf,
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board_X540_vf,
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};
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extern const struct ixgbevf_info ixgbevf_82599_vf_info;
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extern const struct ixgbevf_info ixgbevf_X540_vf_info;
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extern const struct ixgbe_mbx_operations ixgbevf_mbx_ops;
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/* needed by ethtool.c */
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extern const char ixgbevf_driver_name[];
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extern const char ixgbevf_driver_version[];
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void ixgbevf_up(struct ixgbevf_adapter *adapter);
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void ixgbevf_down(struct ixgbevf_adapter *adapter);
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void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter);
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void ixgbevf_reset(struct ixgbevf_adapter *adapter);
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void ixgbevf_set_ethtool_ops(struct net_device *netdev);
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int ixgbevf_setup_rx_resources(struct ixgbevf_ring *);
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int ixgbevf_setup_tx_resources(struct ixgbevf_ring *);
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void ixgbevf_free_rx_resources(struct ixgbevf_ring *);
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void ixgbevf_free_tx_resources(struct ixgbevf_ring *);
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void ixgbevf_update_stats(struct ixgbevf_adapter *adapter);
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int ethtool_ioctl(struct ifreq *ifr);
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extern void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector);
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void ixgbe_napi_add_all(struct ixgbevf_adapter *adapter);
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void ixgbe_napi_del_all(struct ixgbevf_adapter *adapter);
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#ifdef DEBUG
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char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw);
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#define hw_dbg(hw, format, arg...) \
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printk(KERN_DEBUG "%s: " format, ixgbevf_get_hw_dev_name(hw), ##arg)
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#else
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#define hw_dbg(hw, format, arg...) do {} while (0)
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#endif
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#endif /* _IXGBEVF_H_ */
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